2531430123 has 4 divisors (see below), whose sum is σ = 3375240168. Its totient is φ = 1687620080.

The previous prime is 2531430119. The next prime is 2531430127. The reversal of 2531430123 is 3210341352.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2531430119) and next prime (2531430127).

It is a cyclic number.

It is not a de Polignac number, because 2531430123 - 2² = 2531430119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2531430093 and 2531430102.

It is not an unprimeable number, because it can be changed into a prime (2531430127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421905018 + ... + 421905023.

It is an arithmetic number, because the mean of its divisors is an integer number (843810042).

Almost surely, 2^2531430123 is an apocalyptic number.

2531430123 is a deficient number, since it is larger than the sum of its proper divisors (843810045).

2531430123 is an equidigital number, since it uses as much as digits as its factorization.

2531430123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843810044.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 2531430123 is about 50313.3195386669. The cubic root of 2531430123 is about 1362.8727702981.

Adding to 2531430123 its reverse (3210341352), we get a palindrome (5741771475).

The spelling of 2531430123 in words is "two billion, five hundred thirty-one million, four hundred thirty thousand, one hundred twenty-three".